CN2415224Y

CN2415224Y - Gate valve

Info

Publication number: CN2415224Y
Application number: CN 00224065
Authority: CN
Inventors: 陈海凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-17
Filing date: 2000-01-17
Publication date: 2001-01-17
Anticipated expiration: 2010-01-17

Abstract

The utility model relates to a gate valve which is mainly composed of a hand wheel (1), a valve rod (2), a valve cover (3), a valve body (5), etc., wherein the valve cover and the valve body are fastened by screw bolts, and the valve rod (2) is arranged on the valve cover (3) through threads. The hand wheel (1) is arranged at the upper end of the valve rod, and the lower end of the valve rod and a column plug (9) are connected into integration through a bearing (7) and a large steel ball (8). The column plug (9) is arranged in a seal sleeve (6), and the seal sleeve (6) is provided with two round holes in the position just opposite to a water inlet and a water outlet of the valve body. The seal sleeve (6) is arranged in the valve body (5). The gate valve with the structure has the advantages of simple structure, reliable seal, convenient maintenance and long service life, and is an ideal replacing product of the existing gate valve.

Description

A kind of gate valve

The utility model relates to a kind of plumbing, says that exactly it is a kind of gate valve.

At present, widely used gate valve on the various pipelines, drawback is a lot.At first, it is to utilize the flashboard lifting to come the controlling liquid break-make, owing to be the metallic hard contact, the one, flashboard is not wear-resisting, and the 2nd, the valve seal poor performance; Secondly, the local long period of soaking that valve rod is connected with flashboard in liquid, easy corrosion stuck with come off, influence valve opening and closing; Moreover Sealing is many, inconvenient maintenance, and the reparation difficulty is big, delays water supply, increases maintenance cost.

Existing gate valve is not enough to be designed the utility model in order to overcome exactly, and it aims to provide a kind of simple in structure, sealing configuration, and the sealing configuration Nover practical, Sealing is few, and good seal performance is easy to maintenance, the novel gate valve of long service life.

For reaching above-mentioned purpose, the utility model has adopted following technological scheme: this kind gate valve mainly is made up of handwheel, valve rod, valve gap, valve body etc., valve gap and valve body adopt bolt firm, valve rod is combined together by Si Ya and valve gap, handwheel is equipped with in the valve rod upper end, the lower end is provided with bearing track by certain position place, bottom, and the bottom is provided with a pit; There is a cylindrical hole upper end of plunger, cylindrical hole is concentric with plunger, be provided with in the cylindrical hole and corresponding bearing track of valve rod and big steel ball pit, bearing track radially have a hole, bearing ball is by this hole bearing track of packing into, plunger is assembled together by this bearing and valve rod, plunger is contained in the stuffing box gland, have two circular holes on the stuffing box gland relatively, circular hole is over against the valve body intake-outlet, stuffing box gland is contained in the valve body, and the two is an interference fit, and the top of stuffing box gland is gently pressed by the lower edge of valve gap.

Adopt the gate valve of above structure, simple in structure, saved sealing gasket between valve body and the valve gap and the sealing material on the valve gap, Sealing reduces; Sealing configuration adopts cylindrical seal, and the optional usefulness of sealing material has the elastic rubber of nature, and is not easy to wear, good airproof performance, and interchangeability is strong; The joint of valve rod and valve plug no longer is subjected to ducted fluid erosion, can effectively prevent the valve rod corrosion, opens and closes flexibly.This kind gate valve, sealing is reliable, and cost is low, and the life-span is long, and is easy to maintenance, is the existing desirable update product of valve.

Below in conjunction with accompanying drawing, describe the utility model in detail,

Fig. 1 is the utility model plan view;

Fig. 2 is the utility model left view;

Fig. 3 is the utility model valve rod plan view;

Fig. 4 is the utility model plunger plan view;

Fig. 5 is the utility model plunger left view;

Fig. 6 is the utility model stuffing box gland plan view;

Fig. 7 is that the utility model stuffing box gland A-A is to sectional view.

By Fig. 1, Fig. 2 as can be seen, the utility model mainly is made up of handwheel 1, valve rod 2, valve gap 3, valve body 5, stuffing box gland 6, bearing 7, big steel ball 8, plunger 9 etc.Valve gap 3 adopts bolt 4 to tighten together with valve body 5, and valve rod 2 is combined together by Si Ya and valve gap 3, and handwheel 1 is equipped with in valve rod 2 upper ends, and the lower end is provided with bearing track 10 by certain position place, bottom as shown in Figure 3, and the bottom is provided with the pit 11 of a placement big steel ball 8.Plunger 9 adopts hard high-quality engineering plastics to make, as Fig. 4, shown in 5, there is a cylindrical hole 12 its upper end, cylindrical hole 12 is concentric with plunger, establish true and corresponding bearing track 13 of valve rod and big steel ball pit 15 in the cylindrical hole 12, bearing track 13 radially have a hole, bearing ball 7 is by this hole bearing track 10 of packing into, in 13, thereby plunger and valve rod are connected as a single entity, big steel ball 8 is housed in the big steel ball pit 15, alleviated the wearing and tearing of valve rod to plunger, had one " L " type hole 16 in the bottom of plunger 9, the outlet in " L " type hole 16 is over against the water outlet of valve body, so that when throttle down, ponding in the valve body can be discharged by " L " type hole, reduces to close the valve resistance, improves the sealability of valve.Plunger 9 is contained in the stuffing box gland 6, and stuffing box gland 6 is formed by three layers, as Fig. 6, shown in Figure 7, inside and outside two-layer for having certain flexible material, as rubber etc., middle one deck is cylindric band steel silk screen 17, utilize this framework layer, improved the rigidity of stuffing box gland 6, had two holes, 18, two circular holes on the stuffing box gland 6 relatively over against the valve body intake-outlet, stuffing box gland 6 is contained in the valve body 5, the two is an interference fit, and the top of stuffing box gland 6 is gently pressed by the lower edge of valve gap 3, prevents that stuffing box gland from rotating in valve body.When manipulating, rotate handwheel 1, drive plunger 9 oscilaltions in stuffing box gland 6, rise to Open valve, drop to the minimizing valve flow by valve rod 2, to extreme lower position be throttle down, thereby finish the keying of valve.

Claims

1, a kind of gate valve, mainly form by handwheel (1), valve rod (2), valve gap (3), valve body (5) etc., valve gap (3) adopts bolt (4) fastening with valve body (5), it is characterized in that: valve rod (2) is combined together by Si Ya and valve gap (3), handwheel (1) is equipped with in valve rod (2) upper end, the lower end is provided with bearing track (10) by certain position place, bottom, and the bottom is provided with the pit (11) of a placement big steel ball (8); There is a cylindrical hole (12) upper end of plunger (9), cylindrical hole (12) is concentric with plunger (9), be provided with in the cylindrical hole (12) and corresponding bearing track (13) of valve rod (2) and big steel ball pit (15), bearing track (13) radially have a hole (14), bearing ball (7) is by this hole bearing track of packing into, plunger (9) is assembled together by this bearing and valve rod (2), and plunger (9) is contained in the stuffing box gland (6); Have two circular holes (18) on the stuffing box gland (6) relatively, circular hole (18) is over against the valve body intake-outlet, and stuffing box gland (6) is contained in the valve body (5), and the two is an interference fit, and the top of stuffing box gland (6) is gently pressed by the lower edge of valve gap (3).

2, a kind of gate valve as claimed in claim 1 is characterized in that: the bottom of described plunger (9) has one " L " type hole (16), and the outlet in " L " type hole (16) is over against the water outlet of valve body.

3, a kind of gate valve as claimed in claim 1 is characterized in that: described stuffing box gland (6) is formed by three layers, and inside and outside two-layer for having certain flexible material, middle one deck is a cylindric band steel silk screen (17).